docs: def map_type_of_region(self, regiontype):
          """
          Note that "stalk" refers to the short arm of acrocentric chromosomes
          chr13,14,15,21,22 for human.
          :param regiontype:
          :return:
  
          """
  
          if regiontype in self.localtt:
              so_id = self.resolve(regiontype)
          else:
              so_id = self.globaltt['chromosome_part']
              LOG.warning(
                  "Unmapped code %s. Defaulting to chr_part '" +
                  self.globaltt['chromosome_part'] + "'.", regiontype)
  
          return so_id